Multi-mode photo-controlled light with timer circuit

ABSTRACT

A photo-controlled light includes an electrical power input port configured to receive electrical power, a light emitting unit that is connected to the electrical power input port and a photosensitive timer module that connects the light emitting unit to the electrical power input port. The photosensitive timer module includes a photosensitive switch unit including a photosensitive element, a control switch and a timing switch unit. The timing switch unit is coupled to the photosensitive switch unit and is configured to connect only the electrical power input port to the light emitting unit for a conduction time frame responsive to the photosensitive switch unit detecting that the light level is less than the luminosity threshold value so that the photosensitive timer module transmits electricity during the conduction time frame when the luminosity detected by the photosensitive element is less than the luminosity threshold value.

RELATED APPLICATION(S)

The present application claims the benefit of Taiwan Utility ModelApplication No. 099215360 (Patent No. M396557), filed Aug. 11, 2010, thedisclosure of which is hereby incorporated herein by reference in itsentirety.

BACKGROUND OF THE INVENTION

The present invention relates to photo-controlled lights.

A conventional photo-controlled light, such as Republic of China NewUtility Model Patent No. M360187 “Bicycle Warning Light,” includes aphotoelectric switch that is connected between a power source and alight bulb, such that the photoelectric switch decides whether or not toclose based on the degree of luminosity detected in the surroundingenvironment. By this means, the photoelectric switch assumes a closedposition when light in the outside environment is insufficient andtransmits electrical power provided by the power source to the lightbulb, causing the light bulb to emit light, thereby providing thefunction of illumination. When there is sufficient light in the outsideenvironment, the photoelectric switch assumes an open position and stopstransmitting electrical power provided by the power source to the lightbulb, thereby avoiding the waste of energy. By means of the aboveelectrical circuit structure, a conventional photo-controlled light canbe mechanically controlled based on the degree of luminosity in theoutside environment and may achieve the goals of rapid response andeffectively reducing electricity consumption.

However, the abovementioned conventional photo-controlled light stilltypically has the following drawback: on-off control of this kind ofconventional photo-controlled light is generally limited to controlbased on the luminosity of the outside environment, and it does notprovide the user with further automatic on-off control in accordancewith how the light is used. For example: late at night, when the user nolonger requires illumination, some conventional photo-controlled lightscannot be automatically turned off as desired so as to conserve energy.This wastes energy. In particular, with regard to a photo-controlledlight that is not connected to the municipal power grid by power linesand which only utilizes solar or wind energy to generate and storeelectricity, the above drawback is more prone to resulting in theproblem of insufficient electricity due to improper energy use, and mayrender the conventional photo-controlled light only capable of providingweak lighting when the user requires full illumination.

SUMMARY OF THE INVENTION

Some embodiments of the present invention provide a photo-controlledlight that includes an electrical power input port configured to receiveelectrical power, a light emitting unit that is connected to theelectrical power input port and a photosensitive timer module thatconnects the light emitting unit to the electrical power input port. Thephotosensitive timer module includes a photosensitive switch unitincluding a photosensitive element that is configured to detect a lightlevel that satisfies a luminosity threshold value. The photosensitivetimer module also includes a control switch and a timing switch unit.The timing switch unit is coupled to the photosensitive switch unit andis configured to only connect only the electrical power input port tothe light emitting unit for a conduction time frame responsive to thephotosensitive switch unit detecting that the light level is less thanthe luminosity threshold value so that the photosensitive timer moduletransmits electricity during the conduction time frame when theluminosity detected by the photosensitive element is less than theluminosity threshold value. The control switch has a first mode thatconnects the photosensitive switch unit and the timing switch unit tothe electrical power input port and a second mode that connects theelectrical power input port to the light emitting unit without passingthrough the photosensitive switch unit or the timing switch unit so thatelectricity is transmitted to the light emitting device regardless ofthe light level detected by the photosensitive switch unit.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a photo-controlled light according tosome embodiments of the present invention.

FIG. 2 is a partial cutaway side view of a photo-controlled lightaccording to some embodiments of the present invention.

FIG. 3 is a schematic diagram of a photo-controlled light according tofurther embodiments of the present invention.

FIG. 4 is a partial cutaway side view of a photo-controlled lightaccording to further embodiments of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

The present invention now will be described more fully hereinafter withreference to the accompanying drawings, in which illustrativeembodiments of the invention are shown. In the drawings, the relativesizes of regions or features may be exaggerated for clarity. Thisinvention may, however, be embodied in many different forms and shouldnot be construed as limited to the embodiments set forth herein; rather,these embodiments are provided so that this disclosure will be thoroughand complete, and will fully convey the scope of the invention to thoseskilled in the art.

It will be understood that, although the terms first, second, etc. maybe used herein to describe various elements, components, regions, layersand/or sections, these elements, components, regions, layers and/orsections should not be limited by these terms. These terms are only usedto distinguish one element, component, region, layer or section fromanother region, layer or section. Thus, a first element, component,region, layer or section discussed below could be termed a secondelement, component, region, layer or section without departing from theteachings of the present invention.

Spatially relative terms, such as “beneath”, “below”, “lower”, “above”,“upper” and the like, may be used herein for ease of description todescribe one element or feature's relationship to another element(s) orfeature(s) as illustrated in the figures. It will be understood that thespatially relative terms are intended to encompass differentorientations of the device in use or operation in addition to theorientation depicted in the figures. For example, if the device in thefigures is turned over, elements described as “below” or “beneath” otherelements or features would then be oriented “above” the other elementsor features. Thus, the exemplary term “below” can encompass both anorientation of above and below. The device may be otherwise oriented(rotated 90° or at other orientations) and the spatially relativedescriptors used herein interpreted accordingly.

As used herein, the singular forms “a”, “an” and “the” are intended toinclude the plural forms as well, unless expressly stated otherwise. Itwill be further understood that the terms “includes,” “comprises,”“including” and/or “comprising,” when used in this specification,specify the presence of stated features, integers, steps, operations,elements, and/or components, but do not preclude the presence oraddition of one or more other features, integers, steps, operations,elements, components, and/or groups thereof. It will be understood thatwhen an element is referred to as being “connected” or “coupled” toanother element, it can be directly connected or coupled to the otherelement or intervening elements may be present. Furthermore, “connected”or “coupled” as used herein may include wirelessly connected or coupled.As used herein, the term “and/or” includes any and all combinations ofone or more of the associated listed items.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of this specification andthe relevant art and will not be interpreted in an idealized or overlyformal sense unless expressly so defined herein.

As will be further described herein, some embodiments of the presentinvention provide a photo-controlled light including an electrical powerinput port, a photosensitive timer module, and a light-emitting unit.The electrical power input port receives electrical power. Thephotosensitive timer module is connected in series to the electricalpower input port. The photosensitive timer module possesses aphotosensitive element and is provided with a luminosity threshold valueand a conduction time frame. When the luminosity detected by thephotosensitive element is less than the luminosity threshold value, thephotosensitive timer module transmits the electrical power during theconduction time frame. The light-emitting element is connected in seriesto the photosensitive timer module. Thereby, the effect of conservingenergy may be achieved.

Some embodiments provide a photo-controlled light that not only turns onand off automatically in accordance with the luminosity of thesurrounding environment, but also such that its time of continuousoperation may be controlled, which may achieve the goal of effectivelyconserving energy.

Some embodiments provide a photo-controlled light whose photo-controlfunctionality or timer functionality can be turned off as needed by theuser so as to provide modified modes of operation, which may achieve thegoal of increased operational features.

To further clarify the above-described and other objectives, features,and advantages of the present work, some embodiments will be describedbelow in combination with the attached drawings, a detailed descriptionof which follows.

Referring first to FIG. 1, which is a schematic diagram of thephoto-controlled light, and FIG. 2, which is the partially cutout sideview of a photo-controlled light, some embodiments will be furtherdescribed. In the embodiments of FIGS. 1 and 2, the photo-controlledlight includes an electrical power input port 1, a photosensitive timermodule 2 and a light-emitting unit 3. The electrical power input port 1,photosensitive timer module 2, and light-emitting unit 3 are connected,in this order, in series as seen in FIG. 1.

The illustrated electrical power input port 1 forms part of the surfaceof the photo-controlled light so as to receive electrical power used todrive the photo-controlled light; wherein, the shape of the electricalpower input port 1 may be that of a spiral [screw] lamp base, as shownin FIG. 2, so as to connect to the municipal power grid; but it may beof any shape necessary to meet usage requirements, so as to work withvarious direct or alternating current power sources, such as dry cellbatteries, solar power, wind power, and the like. In addition, whenalternating current (such as that supplied by the municipal power grid)is desired as the power source for the photo-controlled light of thepresent invention, the electrical power input port 1 may be additionallyprovided with a rectifier to rectify the current and stabilize thevoltage of the input electricity.

The photosensitive timer module 2 is electrically connected to theelectrical power input port 1, so as to transmit electricity from theelectrical power input port 1. The photosensitive timer module 2includes a photosensitive switch unit 21 and a timing switch unit 22.The photosensitive switch unit 21 and the timing switch unit 22 areconnected in series; wherein, as shown in FIG. 1, the photosensitiveswitch unit 21 can be connected to the electrical power input port 1 andthe timing switch unit 22 can be connected to the light-emitting unit 3.Specifically, in the embodiments depicted in FIG. 1 and FIG. 2, thephotosensitive switch unit 21 includes an electronic switch 211 and aphotosensitive element 212. The electronic switch 211 is connected inseries to the timing switch unit 22 and the photosensitive element 212is externally exposed on the surface of the photo-controlled light whilebeing electrically connected to the electronic switch 211. By thismeans, when the photosensitive element 212 detects that luminosity inthe external environment of the photo-controlled light is less than theluminosity threshold value, the electronic switch 211 is moved into theclosed position, thereby transmitting electricity to the timing switchunit 22. If the luminosity in the external environment of thephoto-controlled light is not less than the luminosity threshold value,the photosensitive element 212 causes the electronic switch 211 to open,stopping the transmission of electricity to the timing switch unit 22.Therefore, the photosensitive switch unit 21 can determine based on theluminosity of the external environment when to supply electricity to thetiming switch unit 22.

The timing switch unit 22 is configured to have a conduction time frame.The illustrated timing switch unit 22 includes a time-setting element221 so that the user can set the conduction time frame, therebydetermining the length of time that electricity, after it is initiallytransmitted to the timing switch unit 22, can be transmitted through thetiming switch unit 22. The conduction time frame can be limited, forexample, as follows: unlimited, limited to 2 hours, limited to 5 hours,or limited to 8 hours, etc. In some embodiments, an electronic clock maybe included in the timing switch unit 22 and the conduction time framecould be a duration between a first moment and a second moment, so as toallow the user to employ the time-setting element 221 to set a firstmoment and a second moment of the conduction time frame, therebydeciding the timer period when electricity is permitted to pass throughthe timing switch unit 22. For example, the conduction time frame may belimited as follows: every evening from 7 p.m. to 12 midnight or, onevery work day during the week, from 7 p.m. to 10 p.m., etc.

The light-emitting unit 3 is electrically connected to the timing switchunit 22 of the photosensitive timer module 2 such that, when theelectronic switch 211 is in the closed position during the conductiontime frame, electricity from the electrical power input port 1 isreceived through the photosensitive timer module 2, and light is therebygenerated. In addition, to allow the light-emitting unit 3 to produce astable light source, the light generated by the light-emitting unit 3 sothat it does not impinge on the photosensitive element 212 in a manneraffecting the detection of a low external light level so as to avoidhaving the photosensitive element 212, as a result of detecting thelight emitted by the light-emitting unit 3, turn off the electronicswitch 211, a configuration that could cause the electronic switch 211to switch on and off continuously.

As such, the photo-controlled light of the embodiments of FIGS. 1 and 2not only turns on and off automatically in accordance with theluminosity of the surrounding environment, it may also provide theability to adjust the conduction time frame of the timing switch unit 22in accordance with the user's desire, thereby controlling the continuousoperating time of the photo-controlled light. Therefore, thephoto-controlled light may achieve the effect of greater energyconservation, compared to a conventional photo-controlled light.

FIG. 3 and FIG. 4 are, respectively, a schematic diagram and a side-viewunit-assembly drawing of further embodiments of a photo-controlledlight. In comparison with the embodiments of FIGS. 1 and 2, thephoto-controlled light in FIGS. 3 and 4 further includes a controlswitch 4 connected in series between the electrical power input port 1and the photosensitive timer module 2. The control switch 4 may be asingle-input, multiple-output selector switch. Specifically, theillustrated control switch 4 has an electrical power input terminal 41,a first electrical power output terminal 42, and a second electricalpower output terminal 43.

Depending upon the mode of operation of the control switch 4, theelectrical power input terminal 41 is electrically connected to eitherthe first electrical power output terminal 42 or the second electricalpower output terminal 43. With regard to connections among the othercomponents, the electrical power input terminal 41 is connected to theelectrical power input port 1; the first electrical power outputterminal 42 is connected to the photosensitive switch unit 21 of thephotosensitive timer module 2; and the second electrical power outputterminal 43 is connected to the light-emitting unit 3. Thereby, bycontrolling the relationship of electrical connections between theelectrical power input terminal 41 and the two electrical power outputterminals 42 and 43 (the mode of the control switch), it is possible todetermine whether electricity received by the electrical power inputport 1 has to be transmitted via the photosensitive timer module 2 tothe light-emitting unit 3. In other words, when electrical power inputterminal 41 is electrically connected with the first electrical poweroutput terminal 42, the photosensitive timer module 2 and thelight-emitting unit 3 of the present embodiment operate as describedwith reference to FIGS. 1 and 2. When the electrical power inputterminal 41 is electrically connected to the second electrical poweroutput terminal 43, electricity from the electrical power input port 1is transmitted directly to the light-emitting unit 3 via the controlswitch 4, causing the photo-control functionality and timingfunctionality of the photo-controlled light activation to be bypassed,thus letting the photo-controlled light operate like a standard light.

As also shown in FIG. 3, in some embodiments, the control switch 4 ofthe photo-controlled light may additionally possess a third electricalpower output terminal 44, with the electrical power input terminal 41being electrically connected to the first electrical power outputterminal 42, the second electrical power output terminal 43, or thethird electrical power output terminal 44. The third electrical poweroutput terminal 44 is connected to the timing switch unit 22 of thephotosensitive timer module 2. When the electrical power input terminal41 is electrically connected to the third electrical power outputterminal 44 (in a third mode of the control switch 4), the photo-controlfunctionality of the photo-controlled light of the present work can bebypassed, thereby causing the timing switch unit 22 to prevent thelight-emitting unit 3 from receiving electricity and emitting lightexcept during the conduction time frame. In such embodiments, it will beunderstood that the timing switch unit will be configured to operate asit would responsive to a low light level of light detected by thephotosensitive switch unit 21, for example, by inputting a appropriatelight level detected input directly to the timing switch unit 22.

By means of the above described control switch 4, some embodiments ofthe photo-controlled light can not only, as in the photo-controlledlight of FIGS. 1 and 2, provide automatic on-off functionality based onthe luminosity of the environment and timing functionality, responsiveto luminosity of the environment or not, but also provides the user withthe option of disabling (turning off) the photo-control or timingfunctionality as desired, thereby having the effect of increasing theoperational features of the photo-controlled light.

As described above, the photo-controlled light of FIGS. 1 and 2 may havemultiple modes of operation under photo-control, such as unlimited time(i.e., whenever a low enough level of external light is detected),limited to 2 hours, limited to 5 hours or limited to 8 hours or thelike, which may be set by a user with the time-setting element 221. Theembodiments of FIGS. 3 and 4 may provide additional modes. In someembodiments, a memory feature is provided to retain a memory of which ofthese modes has been selected even when power is lost to the light (i.e.no power is available on the input port 1). In such embodiments, a usermay benefit by, for example, being able to program the light in theirhome and then simply install the light in an outside/hard to accessfixture, which may ease programming of the light.

Some embodiments may further include a visible indicator light for auser, which may be proximate the time-setting element 221. For example,a light emitting diode (LED), such as a blue LED may provide variousfeatures. In some embodiments, the LED may be used with three differentcontexts. First, when the photo-controlled light (lamp) is beingprogrammed the LED may flash indicating what mode the lamp is set to.For example, for the four mode example described above, mode 1 (dusk todawn operation) may be selected by pushing the time-setting element 221one time and the LED will flash one time. Mode 2 (lamp comes on at duskand operates for 2 hours) may be selected by pushing the time-settingelement 221 two times and the LED will flash two times. Mode 3 (lampcomes on at dusk and operates for 5 hours) may be selected by pushingthe time-setting element 221 three times and the LED will flash threetimes. Mode 4 (lamp comes on at dusk and operates for 8 hours) may beselected by pushing the time-setting element 221 four times and the LEDwill flash four times.

When the lamp is programmed by the time-setting element 221 in someembodiments, a selected time after completing programming, such as fiveseconds after the last LED flash described above, the LED will flash onemore time indicating that the mode has been set and saved into memory.When the LED flashes the last time to indicate that the mode has beenset and saved in memory the LED operate in several ways in differentembodiments. For example, if the lamp is programmed to unlimited modethe LED will remain off. If the lamp is programmed in a Time Set modethe LED will remain on. Such embodiments may provide the user a way totell if the lamp is in time set mode or unlimited mode visually.

The foregoing is illustrative of the present invention and is not to beconstrued as limiting thereof. Although a few exemplary embodiments ofthis invention have been described, those skilled in the art willreadily appreciate that many modifications are possible in the exemplaryembodiments without materially departing from the novel teachings andadvantages of this invention. Accordingly, all such modifications areintended to be included within the scope of this invention as defined inthe claims. In the claims, means-plus-function clauses are intended tocover the structures described herein as performing the recited functionand not only structural equivalents but also equivalent structures.Therefore, it is to be understood that the foregoing is illustrative ofthe present invention and is not to be construed as limited to thespecific embodiments disclosed, and that modifications to the disclosedembodiments, as well as other embodiments, are intended to be includedwithin the scope of the appended claims. The invention is defined by thefollowing claims, with equivalents of the claims to be included therein.

That which is claimed:
 1. A photo-controlled light, comprising: anelectrical power input port configured to receive electrical power; alight emitting unit that is connected to the electrical power inputport; and a photosensitive timer module that connects the light emittingunit to the electrical power input port, wherein the photosensitivetimer module includes: a photosensitive switch unit including aphotosensitive element that is configured to detect a light level thatsatisfies a luminosity threshold value; a timing switch unit coupled tothe photosensitive switch unit that is configured to only connect theelectrical power input port to the light emitting unit for a conductiontime frame responsive to the photosensitive switch unit detecting thatthe light level is less than the luminosity threshold value so that thephotosensitive timer module transmits electricity during the conductiontime frame when the luminosity detected by the photosensitive element isless than the luminosity threshold value; and a control switch having afirst mode that connects the photosensitive switch unit and the timingswitch unit to the electrical power input port and a second mode thatconnects the electrical power input port to the light emitting unitwithout passing through the photosensitive switch unit or the timingswitch unit so that electricity is transmitted to the light emittingdevice regardless of the light level detected by the photosensitiveswitch unit.
 2. The photo-controlled light of claim 1, wherein thecontrol switch further includes a third mode that connects theelectrical power input port to the timing switch unit without passingthrough the photosensitive switch unit so that electricity istransmitted to the light emitting device for the conduction time frameregardless of the light level detected by the photosensitive switchunit.
 3. The photo-controlled light of claim 1, wherein thephotosensitive timer module includes a time-setting element configuredto set the conduction time frame, the time-setting element beingpositioned on an outer surface of the photo-controlled light.
 4. Thephoto-controlled light of claim 1, wherein the photosensitive switchunit is connected to the electrical power input port and the timingswitch unit is connected to the light-emitting unit.
 5. Thephoto-controlled light in of claim 4, wherein the photosensitive switchunit includes an electronic switch, the electronic switch beingconnected in series with the timing switch unit and electricallyconnected to the photosensitive element.
 6. The photo-controlled lightof claim 4, wherein the control switch is connected in series betweenthe electrical power input port and the photosensitive timer module. 7.The photo-controlled light of claim 6, wherein the control switchincludes an electrical power input terminal, a first electrical poweroutput terminal, and a second electrical power output terminal; theelectrical power input terminal being electrically connected to thefirst electrical power output terminal in the first mode or the secondelectrical power output terminal in the second mode, the electricalpower input terminal being connected to the electrical power input port,the first electrical power output terminal being connected to thephotosensitive timer module, and the second electrical power outputterminal being connected to the light-emitting unit.
 8. Thephoto-controlled light of claim 7, wherein the control switch includes athird electrical power output terminal, the electrical power inputterminal being electrically connected to the first electrical poweroutput terminal in the first mode, the second electrical power outputterminal in the second mode, or the third electrical power outputterminal in a third mode of the control switch, and wherein the thirdelectrical power output terminal is connected to the timing switch unitof the photosensitive timer module to configure the timing switch unitto transmit electricity regardless of the light level detected by thephotosensitive switch unit.